DS32kHz 32.768kHz Temperature-Compensated Crystal Oscillator www.maxim-ic.com GENERAL DESCRIPTION FEATURES The DS32kHz is a temperature-compensated Accurate to 4 Minutes/Year (-40C to +85C) crystal oscillator (TCXO) with an output Accurate to 1 Minute/Year (0C to +40C) frequency of 32.768kHz. This device addresses Battery Backup for Continuous Timekeeping applications requiring better timekeeping V Operating Voltage: 2.7V to 5.5V with V BAT CC accuracy, and can be used to drive the X1 input Grounded of most Dallas Semiconductor real-time clocks V Operating Voltage: 4.5V to 5.5V CC (RTCs), chipsets, and other ICs containing Operating Temperature Range: RTCs. This device is available in commercial 0C to +70C (Commercial) (DS32kHz) and industrial (DS32kHz-N) -40C to +85C (Industrial) temperature versions. No Calibration Required Low-Power Consumption Surface Mountable Using BGA Package APPLICATIONS UL Recognized GPS Receivers ORDERING INFORMATION Telematics TEMP PIN- Network Timing and Synchronization in Servers, PART TOP MARK* RANGE PACKAGE Routers, Hubs, and Switches DS32KHZ/DIP 14 DIP 0C to +70C DS32KHZ Automatic Power Meters DS32KHZN/DIP -40C to +85C 14 DIP DS32KHZ-N DS32KHZS 0C to +70C 16 SO (0.300) DS32KHZS DS32KHZS 0C to +70C 16 SO (0.300) DS32KHZS DS32KHZSN -40C to +85C 16 SO (0.300) DS32KHZSN DS32KHZSN 16 SO (0.300) -40C to +85C DS32KHZSN DS32KHZ/WBGA 0C to +70C 36 BGA DS32KHZ DS32KHZN/WBGA -40C to +85C 36 BGA DS32KHZ-N Denotes a RoHS-compliant device that may include lead that is exempt Functional Diagrams under the RoHS requirements. The lead finish is JESD97 category e3, and is compatible with both lead-based and lead-free soldering processes. *A anywhere on the top mark denotes a RoHS-compliant device. An N denotes an industrial device. PIN CONFIGURATIONS Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct REV: 080607 at 1-888-629-4642, or visit Maxims website at www.maxim integrated.com. AVAILABLEDS32kHz ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground-3.0V to +7.0V Operating Temperature Range (Noncondensing) Commercial:..0C to +70C Industrial:-40C to +85C Storage Temperature Range.-40C to +85C Soldering Temperature (BGA, SO).See the Handling, PC Board Layout, and Assembly section. Soldering Temperature, Leads (DIP)..+260C for 10 seconds (Note 1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED DC OPERATING CONDITIONS (T = -40C to +85C) (Note 1) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Power-Supply Voltage V (Note 2) 4.5 5.0 5.5 V CC 3.5, Battery Voltage V (Notes 2, 3) 2.7 3.0 V BAT 5.5 DC ELECTRICAL CHARACTERISTICS (Over the operating range, unless otherwise specified.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V = 0V or BAT Active Supply Current I 150 220 2.7V V 3.5V A CC BAT (Notes 3, 4) Battery Input-Leakage Current I V MIN V V MAX -50 +50 nA BATLKG CC CC CC High Output Voltage (V) V I = -1.0mA (Note 2) 2.4 V CC OH OH Low Output Voltage V I = 2.1mA (Note 2) 0.4 V OL OL High Output Voltage (V) V I = -0.1mA (Note 2) 2.4 V BAT OH OH Battery Switch Voltage V (Note 2) V V SW BAT (V = 0V, T = -40C to +85C.) (Note 1) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Active Battery Current I V = 3.3V (Notes 4, 5, 6) 1 4 A BAT BAT Battery Current During I V = 3.3V (Notes 4, 5, 7) 450 A BATCNV BAT Temperature Measurement Note 1: Limits at -40C are guaranteed by design and are not production tested. Note 2: All voltages are referenced to ground. Note 3: V must be no greater than 3.5V when the device is used in the dual-supply operating modes. BAT Note 4: Typical values are at +25C and 5.0V V , 3.0 V , unless otherwise indicated. CC BAT Note 5: These parameters are measured under no output load conditions. Note 6: This current is the active-mode current sourced from the backup supply/battery. Note 7: A temperature conversion lasts 122ms (typ) and occurs on power-up and then once every 64 seconds. 2 of 8